Question
In an electrochemicalcell, dichromate ions in aqueous acidic medium are reduced to Cr ^ 3+ . The current (in amperes) that flows through the cell for 48.25 minutes to produce 1 mole of Cr ^ 3+ is _____ . Use: 1 Faraday =96500 C mol ^ -1
JEE Advanced
Chemistry
Electrochemistry
2025
JEE Advanced 2025 (Paper 1)
JEE Advanced Chemistry Question (2025) — Solution
Options
- A. A
- B. B
- C. C
- D. D
Answer
A. A
Step-by-step solution
For reduction of dichromate, balanced reaction is : Cr _2 O _7^ -2 ( aq )+6 e ^ - +14 H ^ + ( aq ) 2 Cr ^ 3+ ( aq )+7 H _2 O ( l ) 3 Mole 1 Mole Number of Farads required =3 ~mol Let current = I amperes aligned & I 48.25 60 96500 =3 \\ & I=100 ~A aligned
Related: Chemistry — Electrochemistry · All PYQ Banks